Air Defence Research Sub-Committee Papers (A.D.R. 1-11) and other prints Including note by Sir Maurice Hankey on the membership and terms of reference of the Commitee (A.D.R. 1) Tentative outline of the work for the Committee (A.D.R. 2) Report and memorandum by the Home Defence Sub-Committee of the CID on the Re-orientation of the Air Defence System of Great Britain (A.D.R. 3) Memorandum by the Home Defence Sub-Committee of the CID - on the Organisation and expansion of the Observer Corps (A.D.R. 4) Memorandum by Group-Captain Francis Don, Air Attache, Berlin, Germany, on Air Raid Protection Exercise (Luftschutzubung) in Berlin (A.D.R. 5) Notes prepared by the War Office on problems of location and detection of aircraft (A.D.R. 6) Notes prepared by the Admiralty on problems of location and detection of aircraft (A.D.R. 7) Note by the Director, Meteorological Office, Air Ministry, on Meteorological Information, with tables showing cloud table and duration of bright sunshine for Croydon, 1929-34 (A.D.R. 8) Letter from John Hodsoll, Air Raid Precautions Department, Home Office to CID on Fire Precautions (A.D.R. 9) First Interim Report of the Committee for the Scientific Survey of Air Defence, Chaired by Henry Tizard (A.D.R. 10) Conclusions of Second Meeting of the Sub-Committee Memorandum by the Air Staff on the Problems of Air Defence (A.D.R. 11).